At Scribd there are posted two British 1944 reports examining a Soviet T-34 and a KV-1 tank. There are several interesting aspects to these reports. The British report writers seem relatively impressed with the Russian vehicles, stating that:
The design shows a clear-headed appreciation of the essential of the an effective tank and the requirements of war, duly adjusted to the particular characteristics of the Russian soldier, the terrain and the manufacturing facilities available. When it is considered how recently Russia has become industrialized and how great a proportion of the industrialized regions have been over-run by the enemy, with consequent loss of hurried evacuation of plant and workers, the design and production of such useful tanks in such great numbers stands out as an engineering achievement of the first magnitude.
For those that like to obsess over armor, the reports include fairly detailed diagrams noting the thickness of armor for each vehicle, including Brinell hardness figures. Click on cover image to go to the Scribd page.